In Insert Coin, we look at an exciting new tech project that requires funding before it can hit production. If you'd like to pitch a project, please send us a tip with "Insert Coin" as the subject line.

You still can't power on your smartphone across the pond in London and expect to pay the same fees you do back in New York, but several offerings make it cheaper to get online across the globe. One of our favorites, KeepGo (formerly iPhoneTrip), has been our preferred method for browsing the web in Canada, Cambodia, and everywhere in between. But daily rates do add up, and that service requires that you swap in a separate SIM, tucking your primary card away until you're back on your contracted network's home turf. KnowRoaming, a new player in this space, has an even more appealing option, however. That firm's SIM "stickers" include all the electronics in a thin film that you can attach to any SIM card using the included applicator. The sticker sits dormant in your unlocked phone when you're at home, but once you cross a border, the service prompts you to jump onto a local network, bypassing your original SIM in the process.